WO2014202014A1

WO2014202014A1 - Wcdma adjacent cell interference control method, device and wcdma system

Info

Publication number: WO2014202014A1
Application number: PCT/CN2014/080301
Authority: WO
Inventors: 李灵; 詹建明; 王琛
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-06-20
Filing date: 2014-06-19
Publication date: 2014-12-24
Also published as: CN104244387A; CN104244387B; EP3013103A1; EP3013103A4; EP3013103B1

Abstract

A WCDMA adjacent cell interference control method, device and WCDMA system are disclosed in the embodiment of the present invention. The method includes that: the feature information of each user terminal inside the non-handover region of a cell and the adjacent cell having the same frequency thereof (that is the region outside the boundary of the downlink coverage region of the cell) is acquired; then the interference terminals of the cell are determined according to the acquired feature information, and the control instructions are transmitted to the cells in which these interference terminals locate to control the power of these interference terminals; thus the interference to the cell caused by these interference terminals, which locate outside the boundary of the downlink coverage region, is controlled.

Description

WCDMA neighboring area interference control method, device and WCDMA system

The present invention relates to communication technologies, and in particular, to a WCDMA neighbor interference control method, device, and WCDMA system. Background technique

Currently, widely used wireless communication systems include: Global System for Mobile Communication (GSM), Wideband Code Division Multiple Access (WCDMA), and code division multiple access. 2000 (Code Division Multiple Access, CDMA2000 for short), Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), 4 Inter-wave Interoperability for Microwave Access , referred to as Wimax, Long-Term Evolution (LTE). In the architecture of the above wireless communication system, small-area interference is an inherent problem of the system, which seriously affects system performance. The reason for this is that user terminals using the same frequency resources in each cell may interfere with each other. If the cell interference is severe, it will directly affect the coverage capability and system capacity of the system. In particular, the cell edge user terminals will directly cause them to frequently drop the network or access the network. Reducing inter-cell interference is an important goal in the design of wireless communication systems.

Traditional WCDMA uplink processing often needs to consider interference from neighbors and interference from neighbors. For example, in the High Speed Uplink Packet Access (HSUPA) service scheduling, when the following two conditions are met, the Enhanced Dedicated Channel (E-Ding) DCH, the Service Enhanced Dedicated Channel) sends the relative grant downgrade RG ( Relative Grant ) DOWN command:

1) The current community's RTWP (Received Total Wideband Power) exceeds RNC (Radio) Network Controller (referred to as RNC, ie radio network controller) configured target RTWP;

2) Non-serving E-DCH to total E-DCH power ratio (ratio of non-serving E-DCH received power to E-DCH total received power) exceeds the target value of the RNC configuration.

However, this method can only control the user terminal of the Non-serving E-DCH in the E-DCH active set (the active set is the set of cells with the E-DCH bearer between the UE), and the user terminal not in the E-DCH active set. There is no way to control, but in actual network deployment, the uplink coverage boundary of the base station cell is often larger than the downlink coverage boundary. Referring to FIG. 1, the user terminal UE1 is in the soft handover area, and UE2 is not in the soft handover area; and the soft handover procedure is based on the UE. The strength of the downlink signal is measured to determine whether the activation set is triggered to be increased. Therefore, the user terminal UE2 that is in the cell uplink coverage but is not in the cell downlink coverage may not be able to pass the RG delivered by the Non-serving E-DCH. The DOWN command controls upstream interference. Even if the triggering activation set is increased by the strength of the uplink signal, the E-RGCH (Enhanced Relative Grant Channel, E-RGCH) signal of the Non-serving E-DCH downlink cannot be sent to The user terminal UE2, because the user terminal UE2 is outside the boundary of the downlink coverage, the RG command signal of the received E-RGCH is too bad, which may cause the demodulated RG command to be in error, and the uplink of the user terminal UE2 cannot be performed. Power control, can not maximize the uplink load capacity of Serving E-DCH. Summary of the invention

The embodiment of the invention provides a WCDMA neighboring area interference control method, device and WCDMA system, which solves the problem that the WCDMA system cannot control the interference of the user terminal outside the cell downlink coverage boundary.

The technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a WCDMA neighboring area interference control method, including:

Obtaining feature information of each user terminal in the non-handover region of the target cell and the same frequency neighboring cell of the target cell; Determining an interference terminal of the target cell according to the feature information;

And transmitting a control instruction to the cell where the interference terminal is located, and performing power control on the interference terminal.

Preferably, the determining, according to the feature information, the interference terminal of the cell, the method includes: obtaining, according to the feature information, uplink transmit power of each user terminal in the non-handover region in the target cell, The uplink transmit power of all user terminals in the handover area is used as the interference power of the target cell, and all the user terminals in the non-handover region are determined as the interference terminals of the target cell;

Or,

Obtaining an uplink transmit power of each user terminal in the non-handover region in the target cell according to the feature information, and obtaining an uplink transmit power that is greater than a preset uplink transmit power threshold, and/or The uplink transmit power of the user terminal in the target cell with the pilot signal to noise ratio greater than the preset pilot signal to noise ratio threshold is determined as the interference power of the target cell; and the uplink transmit power is greater than the preset uplink transmit power threshold. The user terminal, and/or the user terminal in the target cell whose pilot signal to noise ratio is greater than the preset pilot signal to noise ratio threshold, is determined as the interference terminal of the target cell.

Preferably, the sending a control command to the cell where the interference terminal is located, and performing power control on the interference terminal, includes:

And when the current load of the target cell is greater than a preset load threshold, and/or the interference power proportion of the target cell is greater than a preset interference specific gravity threshold, the terminal uplink transmit power control command is sent to the cell where the interference terminal is located.

Preferably, the reducing the terminal uplink transmit power control instruction comprises: reducing at least one of a relative grant instruction of the terminal, reducing an absolute grant command of the terminal, and lowering an uplink data rate command of the terminal.

Preferably, the acquiring target cell and the target cell are in a non-switching area of the same frequency neighboring area Characteristic information of each user terminal, including:

Determining, according to a channel quality indicator in an intra-frequency neighboring cell of the target cell, each user terminal in the non-switching area;

Obtaining feature information of each user terminal that is determined to be in the non-handover area;

and / or,

Determining, according to downlink signal strength information of the same-frequency neighboring cell from the target cell, each user terminal in the non-handover region;

Obtaining feature information of each user terminal that is determined to be in the non-handover area.

An embodiment of the present invention further provides a WCDMA system, including a radio network controller and a first base station;

The radio network controller is configured to acquire feature information of each user terminal in the non-handover area of the same-frequency neighboring cell as the target cell; and send the acquired feature information to the first base station, where the target cell is Describe the cell where the first base station is located;

The first base station is configured to determine an interference terminal of the cell according to the feature information, send a control command to a cell where the interference terminal is located, and perform power control on the interference terminal.

Preferably, the first base station is further configured to obtain uplink transmit power of each user terminal in the target cell in the non-handover region according to the feature information, and use uplink transmit power of all the user terminals as the cell Interference power, determining all the user terminals in the non-handover area as interference terminals of the cell;

Or, configured to obtain, according to the feature information, an uplink transmit power of each user terminal in the non-handover region in the target cell, and obtain an uplink transmit power that is greater than a preset uplink transmit power threshold in the obtained uplink transmit power. And/or the uplink transmit power of the user terminal in which the pilot signal to noise ratio in the target cell is greater than the preset pilot signal to noise ratio threshold is determined as the interference power of the target cell; and the uplink transmit power is greater than the preset a user terminal having an uplink transmit power threshold, and/or a user terminal having a pilot signal to noise ratio in the target cell that is greater than a preset pilot signal to noise ratio threshold, Determined as an interfering terminal of the target cell.

Preferably, the first base station is further configured to: when the current load of the target cell is greater than a preset load threshold, and/or the interference power specific gravity of the target cell is greater than a preset interference specific gravity threshold, to the interference terminal The second base station corresponding to the cell transmits a lower terminal uplink transmit power control command.

Preferably, the radio network controller is further configured to: determine, according to a channel quality indicator in an intra-frequency neighboring cell of the target cell, each user terminal in the non-handover region, and obtain the determination to be in the Feature information of each user terminal in the non-handover area;

and / or,

And determining, according to downlink signal strength information in the same-frequency neighboring cell from the target cell, each user terminal in the non-handover region, and acquiring feature information of each user terminal that is determined to be in the non-handover region.

The embodiment of the invention further provides a radio network controller, including:

The acquiring unit is configured to acquire feature information of each user terminal in the non-handover area of the same frequency neighboring cell as the target cell;

The first communication unit is configured to send the acquired feature information to the first base station, where the target cell is a cell where the first base station is located.

Preferably, the radio network controller further includes:

a first determining unit, configured to determine, according to a channel quality indicator in an intra-frequency neighboring cell of the target cell, each user terminal in the non-handover region; and/or,

Determining, according to downlink signal strength information in the same frequency neighboring cell from the target cell, each user terminal in the non-handover region; The acquiring unit is further configured to acquire feature information of each user terminal that is determined to be in the non-handover area.

The embodiment of the invention further provides a first base station, including:

a second determining unit, configured to determine an interference terminal of the cell according to the feature information, where the second communication unit is configured to send a control command to the cell where the interference terminal is located, and perform power control on the interference terminal.

Preferably, the second determining unit includes:

a first determining module, configured to obtain, according to the feature information, uplink transmit power of each user terminal in the non-handover region in the target cell;

a second determining module, configured to use the uplink transmit power of all the user terminals as the interference power of the cell, triggering a third determining module; or obtaining, according to the feature information, each user terminal in the non-handover region The uplink transmit power in the target cell, the uplink transmit power of the obtained uplink transmit power being greater than the preset uplink transmit power threshold, and/or the pilot signal to noise ratio in the target cell is greater than the preset pilot. The uplink transmit power of the user terminal of the signal to noise ratio threshold is determined as the interference power of the target cell, and the fourth determining module is triggered;

a third determining module, configured to determine all user terminals in the non-handover area as interference terminals of the cell;

a fourth determining module, configured to: a user terminal whose uplink transmit power is greater than a preset uplink transmit power threshold, and/or a user terminal whose pilot signal to noise ratio in the target cell is greater than a preset pilot signal to noise ratio threshold, Determined as an interfering terminal of the target cell.

Preferably, the second communication unit is further configured to: when the current load of the target cell is greater than a preset load threshold, and/or the interference power specific gravity of the target cell is greater than a preset interference specific gravity threshold, to the interference The second base station corresponding to the cell where the terminal is located sends a lower terminal uplink transmit power control command.

An embodiment of the present invention further provides a computer storage medium, where the computer storage medium is stored Storing computer executable instructions for performing the above

WCDMA neighbor interference control method.

In the embodiment of the present invention, the feature information of each user terminal in the non-handover region of the same-frequency neighboring cell (ie, the area outside the boundary of the downlink coverage of the cell) of the target cell and the target cell is obtained, and the target is determined according to the acquired feature information. The interfering terminal of the cell sends control commands to the cells where the interfering terminals are located to control the power of the interfering terminals, and implements control on interference of the interfering terminals located outside the boundary of the downlink coverage to the target cell, thereby improving system performance. At the same time, improve the satisfaction of the user experience. DRAWINGS

1 is a schematic diagram of uplink interference of a user terminal in a neighboring cell to a target cell; FIG. 2 is a schematic flowchart of a WCDMA neighboring cell interference control method according to Embodiment 1 of the present invention;

3 is a schematic diagram of a non-handover area of a target cell and its co-frequency neighboring area according to Embodiment 1 of the present invention;

4 is a schematic diagram of uplink interference of a user terminal to a target cell according to Embodiment 2 of the present invention; FIG. 5 is a schematic flowchart of controlling the user terminal shown in FIG.

6 is a schematic diagram of uplink interference of a user terminal to a target cell according to Embodiment 2 of the present invention; FIG. 7 is a schematic flowchart of controlling the user terminal shown in FIG.

FIG. 8 is a schematic structural diagram 1 of a radio network controller according to Embodiment 3 of the present invention; FIG. 8 is a schematic structural diagram 2 of a radio network controller according to Embodiment 3 of the present invention; FIG. 9a is a first embodiment of Embodiment 4 of the present invention; Schematic diagram of the structure of the base station;

FIG. 9b is a schematic structural diagram of a second determining unit of a first base station according to Embodiment 4 of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1:

Referring to FIG. 2, the WCDMA neighboring cell interference control method in this embodiment includes the following steps: Step 201: Acquire a cell (for convenience of description, the following is replaced by a target cell) and each user terminal in a non-handover region of the same-frequency neighboring cell Characteristic information

Step 202: Determine, according to the acquired feature information, an interference terminal of the target cell.

Step 203: Send a control command to the determined cell where the interference terminal is located, perform power control on the interference terminal, and further control interference of the interference terminal to the target cell.

Through the above steps, the interference of the interference terminal located outside the boundary of the downlink coverage of the target cell to the target cell can be effectively controlled, and the performance of the system is improved.

As shown in FIG. 3, in this embodiment, the non-handover area of the target cell and its co-frequency neighboring area is the area between the uplink coverage boundary and the downlink coverage boundary of the neighboring cell CELL1, and the downlink coverage area of the target cell CELL2 is removed. Overlapping parts.

In this embodiment, the specific implementation manner of obtaining the feature information of each user terminal in the non-handover area of the cell and its co-frequency neighboring area may be selected according to the specific application scenario. The following specific implementations are used as an example for illustration, but it should be understood that it is not limited to the following two methods:

Manner 1: determining, according to the channel quality indicator CQI of the user equipment in the same-frequency neighboring cell of the target cell, the user terminals that are in the non-handover region, and acquiring the feature information of each user terminal that is determined to be in the non-handover region;

HSUPA (High Speed Uplink Packet Access) service is generally accompanied by HSDPA (High Speed Downlink Packet Access) channel, which compares HSDPA CQI size and makes CQI relatively small. The user terminal determines the user terminals in the non-handover area, and acquires feature information of the user terminals, and The acquired feature information is sent to the target cell; the user terminal with a larger CQI is determined not to be the user terminal in the non-handover region, because the user with a large CQI tends to be closer to the cell center, and the interference to other cells is relatively small. Here, the size of the CQI can be determined according to the previously set CQI threshold. When the CQI is less than the CQI threshold, it is determined to be relatively small. When the CQI is greater than or equal to the CQI threshold, it is determined to be relatively large. In this manner, the non-handover area of the same-frequency neighboring cell is obtained as all the user terminals in the area between the uplink coverage boundary and the downlink coverage boundary of the neighboring cell CELL1, and then the user terminals in the downlink coverage area of the target cell are removed. The remaining user terminals are user terminals in the non-handover area of the target cell and its co-frequency neighboring area. In this embodiment, the target cell may determine which user terminals fall into the area in the downlink coverage area of the target cell by comparing the information of each user terminal (such as the feature information such as the scrambling code), and then remove the user terminals. At the same time, the number of user terminals that need to be searched can be greatly reduced, and the excessive uplink resource search and the excessive control signaling interaction process can be avoided, and the same-frequency neighbors that bring uplink interference can be avoided. The user terminals in the area are effectively monitored.

Manner 2: determining, according to the downlink signal strength information reported by the user terminal when entering the intra-frequency neighboring cell of the target cell, the user terminals in the non-handover region, and acquiring the feature information of each user terminal that is determined to be in the non-handover region, For ease of understanding, the following describes an example of reporting downlink signal strength information as an example:

When the user terminal enters a cell, an EVENT IE event is reported, and according to the event, it can be determined that the user terminal has entered the cell range. Since the EVENT IE event is measured based on the strength of the downlink signal, the EVENT IE event can be set. The absolute threshold is used to monitor the target cell and the user terminal outside the same-frequency neighboring cell handover area; in order to thoroughly monitor the uplink interference caused by the user terminal in the uplink coverage area, the downlink signal strength threshold for triggering the EVENT IE event may be The value is set low enough to enable the user terminal entering the neighboring area to trigger the EVENT IE event, and then report the downlink signal strength information in the neighboring cell. Through the party The non-switching area of the same-frequency neighboring cell can be obtained as all user terminals in the area between the uplink coverage boundary and the downlink coverage boundary of the neighboring cell CELL1, and then the areas falling within the downlink coverage area of the target cell are removed. The remaining user terminals are user terminals in the non-handover area of the target cell and its co-frequency neighboring cell. In this embodiment, the target cell may determine which user terminals fall into the area in the downlink coverage area of the target cell by comparing the information of each user terminal (such as the feature information such as the scrambling code), and then remove the user terminals.

Manner 3: It can be determined in combination with the foregoing manners 1 and 2. For example, the user terminal list in the non-handover region can be determined by using the foregoing scheme 1 and the manner, and then the union of the two or the intersection of the two, etc. .

In this embodiment, the manner of determining the interference terminal of the target cell according to the acquired feature information may also be selected according to the actual application scenario, for example:

All the user terminals in the non-handover area are used as the interference terminals of the target cell, and the uplink transmit power of each user terminal in the non-handover area in the target cell is obtained according to the acquired feature information, and all user terminals in the non-handover area are obtained. The uplink transmit power is used as the interference power of the target cell. The feature information of the user terminal in this embodiment may specifically include an uplink scrambling code, a slot format, user terminal identification information, and the like.

For example, the user terminal that meets certain setting conditions in the non-handover region is used as the interference terminal of the target cell, that is, the user terminals are filtered by using certain screening conditions, thereby reducing the number of post-control user terminals. For example, the uplink transmit power of each user terminal in the non-handover region in the target cell may be obtained according to the obtained feature information, and the uplink transmit power (for example, the DPCCH uplink power) is greater than the preset uplink transmit power threshold, and/or The pilot signal to noise ratio (for example, DPCCH Pilot SIR) in the target cell is greater than the uplink transmit power of the user terminal of the preset pilot signal to noise ratio threshold as the interference power of the target cell; and the uplink transmit power is greater than the preset uplink transmit power. a threshold user terminal, and/or a user terminal in the target cell whose pilot signal to noise ratio is greater than a preset pilot signal to noise ratio threshold as an interference terminal of the target cell; and for the non-handover region A user terminal that does not satisfy the above conditions in the domain is not used as an interfering terminal of the target cell because it is particularly small for the target cell.

After determining the interference terminal of the target cell, the target cell can perform power control on the interference terminal by sending a control command to the cell where the interference terminal is located, thereby interfering with the terminal's control of the target cell interference. In this embodiment, in order to ensure that the interfering terminal can work normally in the cell in which it is located, it may be set that only the current load of the target cell is greater than a preset load threshold, and/or the interference power proportion of each interfering terminal is greater than a preset. When the interference weight threshold is exceeded, the terminal uplink transmit power control command is sent to the cell where the interference terminal is located. In this embodiment, the lowering the uplink transmit power control command of the terminal may include: reducing at least one of a relative authorization command of the terminal, reducing an absolute authorization command of the terminal, and lowering an uplink data rate command of the terminal; At least one of the relative authorization of the user terminal, the reduction of the absolute authorization of the user terminal, or the reduction of the uplink data rate of the user terminal reduces the uplink transmission power of the user terminal, thereby reducing the interference of the user terminal to the target cell. Embodiment 2:

In order to better understand the present invention, the present invention will be further described below in conjunction with a WCDMA system.

The WCDMA system in this embodiment includes a radio network controller and a first base station, where: the radio network controller is configured to acquire, according to the foregoing manner, a cell in which the first base station is located (ie, a target cell) and a non-handover region in the same frequency neighboring area. Feature information of each user terminal; and transmitting the acquired feature information to the first base station;

The first base station is configured to determine an interference terminal of the cell in which the cell is located according to the acquired feature information, and send a control command to the cell where the determined interference terminal is located in the foregoing manner to perform power control on the interference terminal. The present invention will be further described below by taking specific application scenarios as an example.

Referring to FIG. 4, the WCDMA system shown in the figure includes a radio network controller, The second base station, the first base station, the cell where the second base station is located is CELL1, the cell where the first base station is located is CELL2, CELL2 is the target cell, CELL1 is the same frequency neighboring cell of the target cell, and the target cell CELL2 and its co-frequency neighboring area There is a user terminal (UE) in the non-handover area of CELL1, that is, the dry end of the target cell, and the user terminal performs R99 data service in the cell CELL1. At this time, the power control process of the user terminal is shown in FIG. 5, and includes the following steps:

Step 501: When the user terminal enters the cell CELL1, the radio network controller acquires the feature information of the user terminal according to the foregoing manner.

Step 502: The radio network controller sends the acquired feature information to the first base station. Step 503: The first base station determines, according to the acquired feature information, that the user terminal is an interference terminal of the target cell, that is, the cell to which the first base station belongs.

Step 504: The first base station determines whether an uplink load alarm occurs, and if yes, go to step 505; if not, proceed to determine according to the actual situation;

Step 505: Send a lower terminal uplink transmit power control command to the radio network controller, where the lower terminal uplink transmit power control command sent in this embodiment may be a lower terminal uplink data rate command;

Step 506: The radio network controller reconfigures the user terminal according to the reduced terminal uplink data rate command, so as to reduce the uplink data rate of the user terminal.

Step 507: The user terminal feeds back a reconfiguration complete instruction to the radio network controller.

Referring to FIG. 6, the WCDMA system shown in the figure also includes a radio network controller, a second base station, a first base station, a cell where the second base station is located, CELL1, a cell where the first base station is located, CELL2, and CELL2 is set to In the target cell, CELL1 is the same-frequency neighboring cell of the target cell, and a user terminal UE (that is, an interference terminal of the target cell) exists in the non-handover region of the target cell CELL2 and its co-frequency neighboring cell CELL1, and the user terminal performs in the cell CELL1. High-speed uplink packet access service. At this time, the power control process of the user terminal is shown in Figure 7, and includes the following steps: Step 701: When the user terminal enters the cell CELL1, the radio network controller acquires the feature information of the user terminal according to the foregoing manner.

Step 702: The radio network controller sends the acquired feature information to the first base station. Step 703: The first base station determines, according to the acquired feature information, that the user terminal is an interference terminal of the target cell.

Step 704: The first base station determines whether an uplink load alarm occurs, and if yes, go to step 705; if not, proceed to determine according to the actual situation;

Step 705: Send a lower terminal uplink transmit power control command to the radio network controller. The lower terminal uplink transmit power control command sent in this embodiment may include reducing a relative authorization command of the terminal, reducing an absolute authorization command of the terminal, and reducing an uplink of the terminal. At least one of the data rate instructions; the embodiment is described by taking an absolute authorization command for reducing the terminal as an example; Step 706: The radio network controller sends the high speed of the user terminal to the second base station according to the absolute authorization command of the reduced terminal. An instruction for the uplink authorization of the uplink packet access service;

Step 707: The second base station reduces the uplink absolute authorization of the high-speed uplink packet access service of the user terminal. Embodiment 3:

This embodiment describes a radio network controller, as shown in FIG. 8a, including:

The obtaining unit 81 is configured to acquire feature information of each user terminal in the non-handover area of the same frequency neighboring cell as the target cell;

The first communication unit 82 is configured to send the acquired feature information to the first base station, where the target cell is a cell where the first base station is located.

As shown in FIG. 8b, based on FIG. 8a, the radio network controller may further include:

The first determining unit 83 is configured to determine, according to the channel quality indicator in the intra-frequency neighboring cell of the target cell, each user terminal in the non-handover region; and/or, Determining, according to downlink signal strength information in the same frequency neighboring cell from the target cell, each user terminal in the non-handover region;

The obtaining unit 81 is further configured to acquire feature information of each user terminal that is determined to be in the non-handover area.

In an actual application, the obtaining unit 81 and the first determining unit 83 may be implemented by a central processing unit (CPU) of a radio network controller, a digital signal processor (DSP), or a field programmable gate array ( FPGA, Field Programmable Gate Array) implementation; The first communication unit 82 can be implemented by a transmitter of a radio network controller. Embodiment 4:

This embodiment describes a first base station, as shown in FIG. 9a, including:

The second determining unit 91 is configured to determine an interference terminal of the cell according to the feature information. The second communication unit 92 is configured to send a control command to the cell where the interference terminal is located, and perform power control on the interference terminal.

As an embodiment, as shown in FIG. 9b, the second determining unit 91 may include: a first determining module 911, a second determining module 912, a third determining module 913, and a fourth determining module 914;

The first determining module 911 is configured to obtain uplink transmit power of each user terminal in the target cell in the non-handover region according to the feature information;

The second determining module 912 is configured to use the uplink transmit power of all the user terminals as the interference power of the cell, and trigger the third determining module 913; or obtain, according to the feature information, each user in the non-handover region. The uplink transmit power of the terminal in the target cell, the uplink transmit power of the obtained uplink transmit power being greater than the preset uplink transmit power threshold, and/or the pilot signal to noise ratio in the target cell is greater than a preset The uplink transmit power of the user terminal of the pilot signal to noise ratio threshold is determined as the interference power of the target cell, and the fourth determining module 914 is triggered. The third determining module 913 is configured to determine all user terminals in the non-handover region. For the office Interfering terminal of the cell;

The fourth determining module 914 is configured to: the user terminal whose uplink transmit power is greater than the preset uplink transmit power threshold, and/or the user terminal whose pilot signal to noise ratio in the target cell is greater than the preset pilot signal to noise ratio threshold. And determining as an interference terminal of the target cell.

As an embodiment, the second communication unit 92 is further configured to: when the current load of the target cell is greater than a preset load threshold, and/or the interference power specific gravity of the target cell is greater than a preset interference specific gravity threshold, The second base station corresponding to the cell where the interference terminal is located sends a lower terminal uplink transmit power control command.

In a practical application, the second determining unit 91 may be a central processing unit (CPU) of a first base station, a digital signal processor (DSP), or a Field Programmable Gate Array (FPGA). Implementation; The second communication unit 92 can be implemented by a transmitter in the first base station.

In summary, the solution provided by the embodiment of the present invention can effectively solve the impact of inter-cell interference mat system performance, thereby providing user experience satisfaction.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing storage medium includes: a mobile storage device, a random access memory (RAM), a read-only memory (ROM), a magnetic disk, or an optical disk. A medium that can store program code. Alternatively, the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in a contribution to the related art. The computer software product is stored in a storage medium and includes a plurality of instructions for making a computer device (which can be a personal computer, server, or network device, etc.) to execute the hair All or part of the methods described in the various examples. The foregoing storage medium includes: a medium that can store program codes, such as a mobile storage device, a RAM, a ROM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A wideband code division multiple access WCDMA neighbor cell interference control method, including:

Obtain the characteristic information of each user terminal in the non-handover area between the target cell and the same-frequency adjacent cell of the target cell;

Determine interfering terminals of the target cell according to the characteristic information;

Send a control instruction to the cell where the interfering terminal is located, and perform power control on the interfering terminal.

2. The WCDMA neighbor cell interference control method according to claim 1, wherein the determining the interfering terminal of the cell according to the characteristic information includes:

According to the characteristic information, the uplink transmit power of each user terminal in the non-handover area in the target cell is obtained, and the uplink transmit power of all user terminals in the non-handover area is used as the interference power of the target cell, All the user terminals in the non-handover area are determined to be interfering terminals of the target cell;

or,

Obtain the uplink transmit power of each user terminal in the non-handover area in the target cell according to the characteristic information, and use the uplink transmit power greater than the preset uplink transmit power threshold among the obtained uplink transmit powers, and/or The uplink transmit power of user terminals whose pilot signal-to-noise ratio in the target cell is greater than the preset pilot signal-to-noise ratio threshold is determined as the interference power of the target cell; the uplink transmit power of the user terminal that is greater than the preset uplink transmit power threshold is determined User terminals and/or user terminals whose pilot signal-to-noise ratio in the target cell is greater than the preset pilot signal-to-noise ratio threshold are determined to be interfering terminals of the target cell.

3. The WCDMA neighbor cell interference control method according to claim 2, wherein said sending a control instruction to the cell where the interfering terminal is located, and performing power control on the interfering terminal includes:

When the current load of the target cell is greater than the preset load threshold, and/or the target cell's When the interference power proportion is greater than the preset interference proportion threshold, a control instruction to reduce the terminal's uplink transmission power is sent to the cell where the interfering terminal is located.

4. The WCDMA neighbor cell interference control method according to claim 3, wherein the control instruction to reduce the terminal's uplink transmit power includes a instruction to decrease a relative authorization of the terminal, an instruction to decrease an absolute authorization of the terminal, and an instruction to decrease the uplink data rate of the terminal. of at least one.

5. The WCDMA neighbor cell interference control method according to any one of claims 1 to 4, wherein: obtaining the characteristic information of each user terminal in the non-handover area of the target cell and the target cell's co-frequency neighbor cell, include:

Determine each user terminal in the non-handover area according to the channel quality indicator in the same-frequency neighboring cell of the target cell;

Obtain characteristic information of each user terminal determined to be in the non-handover area;

and / or,

Determine each user terminal in the non-handover area according to the downlink signal strength information from the same-frequency neighboring cell of the target cell;

Obtain characteristic information of each user terminal determined to be in the non-handover area.

6. A wideband code division multiple access WCDMA system, including a wireless network controller and a first base station;

The radio network controller is configured to obtain the characteristic information of each user terminal in a non-handover area of a neighbor cell on the same frequency as the target cell; and send the obtained characteristic information to the first base station, and the target cell is the The cell where the first base station is located;

The first base station is configured to determine an interfering terminal of the cell according to the characteristic information, send a control instruction to the cell where the interfering terminal is located, and perform power control on the interfering terminal.

7. The WCDMA system as claimed in claim 6, wherein,

The first base station is further configured to obtain the uplink transmit power of each user terminal in the non-handover area in the target cell based on the characteristic information, and combine the uplink transmit power of all user terminals. The rate is used as the interference power of the cell, and all the user terminals in the non-handover area are determined as interfering terminals of the cell;

Or, be configured to obtain the uplink transmission power of each user terminal in the non-handover area in the target cell according to the characteristic information, and use the uplink transmission power greater than the preset uplink transmission power threshold among the obtained uplink transmission powers. , and/or the uplink transmit power of the user terminal whose pilot signal-to-noise ratio in the target cell is greater than the preset pilot signal-to-noise ratio threshold is determined as the interference power of the target cell; User terminals with an uplink transmit power threshold and/or user terminals with a pilot signal-to-noise ratio in the target cell greater than a preset pilot signal-to-noise ratio threshold are determined to be interfering terminals of the target cell.

8. The WCDMA system as claimed in claim 7, wherein,

The first base station is also configured to respond to the cell where the interfering terminal is located when the current load of the target cell is greater than a preset load threshold, and/or the interference power proportion of the target cell is greater than the preset interference proportion threshold. The second base station sends a control instruction to reduce the terminal's uplink transmission power.

9. The WCDMA system according to claim 8, wherein the command to reduce the terminal's uplink transmission power control command includes at least one of a command to reduce the relative authorization of the terminal, a command to reduce the absolute authorization of the terminal, and a command to reduce the uplink data rate of the terminal.

10. The WCDMA system according to any one of claims 6 to 9, wherein the radio network controller is further configured to determine that the non-handover is in progress based on channel quality indicators in co-frequency neighboring cells of the target cell. Each user terminal in the area, and obtains the characteristic information of each user terminal determined to be in the non-switching area;

and / or,

Each user terminal located in the non-handover area is determined based on the downlink signal strength information from the same-frequency neighboring cell of the target cell, and characteristic information of each user terminal determined to be located in the non-handover area is obtained.

11. A wireless network controller, including:

The acquisition unit is configured to acquire the characteristic information of each user terminal in the non-handover area of the same frequency neighbor cell as the target cell;

The first communication unit is configured to send the obtained characteristic information to the first base station, and the target cell is the cell where the first base station is located.

12. The wireless network controller as claimed in claim 11, wherein the wireless network controller further includes:

The first determining unit is configured to determine each user terminal located in the non-handover area according to the channel quality indicator in the same-frequency neighboring cell of the target cell; and/or,

Determine each user terminal in the non-handover area based on the downlink signal strength information from the same-frequency neighboring cells of the target cell;

The obtaining unit is further configured to obtain characteristic information of each user terminal determined to be in the non-handover area.

13. A first base station, including:

The second determination unit is configured to determine the interfering terminal of the cell based on the characteristic information; the second communication unit is configured to send a control instruction to the cell where the interfering terminal is located, and perform power control on the interfering terminal.

14. The first base station according to claim 13, wherein the second determination unit includes: a first determination module configured to obtain, according to the characteristic information, the position of each user terminal in the non-handover area in the target cell. The uplink transmit power;

The second determination module is configured to use the uplink transmission power of all the user terminals as the interference power of the cell to trigger the third determination module; or, obtain the position of each user terminal in the non-handover area according to the characteristic information. The uplink transmit power in the target cell is the uplink transmit power greater than the preset uplink transmit power threshold, and/or the pilot signal-to-noise ratio in the target cell is greater than the preset pilot The uplink transmission of user terminals with signal-to-noise ratio threshold The transmit power is determined as the interference power of the target cell, triggering the fourth determination module; the third determination module is configured to determine all user terminals in the non-handover area as interfering terminals of the cell;

The fourth determination module is configured to identify user terminals whose uplink transmission power is greater than the preset uplink transmission power threshold, and/or user terminals whose pilot signal-to-noise ratio in the target cell is greater than the preset pilot signal-to-noise ratio threshold, Determine the interfering terminal as the target cell.

15. The first base station according to claim 13 or 14, wherein,

The second communication unit is further configured to: when the current load of the target cell is greater than a preset load threshold, and/or the interference power proportion of the target cell is greater than the preset interference proportion threshold, send a signal to the location where the interfering terminal is located. The second base station corresponding to the cell sends a control instruction to reduce the terminal's uplink transmission power.

16. A computer storage medium. Computer executable instructions are stored in the computer storage medium. The computer executable instructions are used to execute the wideband code division multiple access WCDMA neighbor cell interference described in any one of claims 1 to 7. Control Method.